Answer to Question #239715 in Optics for Blaise

Question

What is the definition of Angular Spread

Answer 1

Angular speed is the rate of change of angle with time, or how quickly the angle changes (for example, when we turn a wheel by 45 degrees in 1 second and 45 seconds, the angular speed is greater in the first case):

$$\omega=\phi/t.$$

Keep in mind that the angle should be expressed in radians.